Series RIF-A with sound absorbing extras

The cost-effective ventilation and sound
insulation solution.

The configuration of this sound attenuated gravity roof ventilator
is based on the basic Series RIF. These ventilators are used for
applications with high noise reduction requirements in buildings
with high specific heat loads or extensive heat sources. The ventilator
shaft and the flow guide roof are cladded with non-combustible sound
absorbing slabs.

The Series RIF-A sound attenuated gravity roof ventilators are tested
in the echo chamber and subjected to large-scale noise tests. These
tests and measurements are essential to precisely ascertain and
guarantee noise reduction properties for frequencies within audition
limits. Series RIF-A gravity roof ventilators attain a sound insulation
factor R’w of 14 dB to 24 dB and a coefficient of discharge
Cv0 of 0.65 to 0.78.

They offer an optimum combination
of high aerodynamic coefficient of discharge Cv0 and
maximum noise reduction efficiency.